classes/pluginhost.php

   1 <?php
   2 class PluginHost {
   3         private $link;
   4         private $hooks = array();
   5         private $plugins = array();
   6         private $handlers = array();
   7         private $commands = array();
   8
   9         const HOOK_ARTICLE_BUTTON = 1;
  10         const HOOK_ARTICLE_FILTER = 2;
  11         const HOOK_PREFS_TAB = 3;
  12         const HOOK_PREFS_SECTION = 4;
  13         const HOOK_PREFS_TABS = 5;
  14         const HOOK_FEED_PARSED = 6;
  15
  16         function __construct($link) {
  17                 $this->link = $link;
  18         }
  19
  20         private function register_plugin($name, $plugin) {
  21                 //array_push($this->plugins, $plugin);
  22                 $this->plugins[$name] = $plugin;
  23         }
  24
  25         function get_link() {
  26                 return $this->link;
  27         }
  28
  29         function get_plugins() {
  30                 return $this->plugins;
  31         }
  32
  33         function get_plugin($name) {
  34                 return $this->plugins[$name];
  35         }
  36
  37         function run_hooks($type, $method, $args) {
  38                 foreach ($this->get_hooks($type) as $hook) {
  39                         $hook->$method($args);
  40                 }
  41         }
  42
  43         function add_hook($type, $sender) {
  44                 if (!is_array($this->hooks[$type])) {
  45                         $this->hooks[$type] = array();
  46                 }
  47
  48                 array_push($this->hooks[$type], $sender);
  49         }
  50
  51         function del_hook($type, $sender) {
  52                 if (is_array($this->hooks[$type])) {
  53                         $key = array_Search($this->hooks[$type], $sender);
  54                         if ($key !== FALSE) {
  55                                 unset($this->hooks[$type][$key]);
  56                         }
  57                 }
  58         }
  59
  60         function get_hooks($type) {
  61                 if (isset($this->hooks[$type])) {
  62                         return $this->hooks[$type];
  63                 } else {
  64                         return array();
  65                 }
  66         }
  67
  68         function load($classlist) {
  69                 $plugins = explode(",", $classlist);
  70
  71                 foreach ($plugins as $class) {
  72                         $class = trim($class);
  73                         $class_file = strtolower(basename($class));
  74                         $file = dirname(__FILE__)."/../plugins/$class_file/$class_file.php";
  75
  76                         if (file_exists($file)) require_once $file;
  77
  78                         if (class_exists($class) && is_subclass_of($class, "Plugin")) {
  79                                 $plugin = new $class($this);
  80
  81                                 $this->register_plugin($class, $plugin);
  82                         }
  83                 }
  84         }
  85
  86         function add_handler($handler, $method, $sender) {
  87                 $handler = str_replace("-", "_", strtolower($handler));
  88                 $method = strtolower($method);
  89
  90                 if (!is_array($this->handlers[$handler])) {
  91                         $this->handlers[$handler] = array();
  92                 }
  93
  94                 $this->handlers[$handler][$method] = $sender;
  95         }
  96
  97         function del_handler($handler, $method) {
  98                 $handler = str_replace("-", "_", strtolower($handler));
  99                 $method = strtolower($method);
 100
 101                 unset($this->handlers[$handler][$method]);
 102         }
 103
 104         function lookup_handler($handler, $method) {
 105                 $handler = str_replace("-", "_", strtolower($handler));
 106                 $method = strtolower($method);
 107
 108                 if (is_array($this->handlers[$handler])) {
 109                         if (isset($this->handlers[$handler]["*"])) {
 110                                 return $this->handlers[$handler]["*"];
 111                         } else {
 112                                 return $this->handlers[$handler][$method];
 113                         }
 114                 }
 115
 116                 return false;
 117         }
 118
 119         function add_command($command, $description, $sender) {
 120                 $command = "-" . str_replace("-", "_", strtolower($command));
 121
 122                 $this->commands[$command] = array("description" => $description,
 123                         "class" => $sender);
 124         }
 125
 126         function del_command($command) {
 127                 $command = "-" . strtolower($command);
 128
 129                 unset($this->commands[$command]);
 130         }
 131
 132         function lookup_command($command) {
 133                 $command = "-" . strtolower($command);
 134
 135                 if (is_array($this->commands[$command])) {
 136                         return $this->commands[$command]["class"];
 137                 } else {
 138                         return false;
 139                 }
 140
 141                 return false;
 142         }
 143
 144         function get_commands() {
 145                 return $this->commands;
 146         }
 147
 148         function run_commands($args) {
 149                 foreach ($this->get_commands() as $command => $data) {
 150                         if (in_array($command, $args)) {
 151                                 $command = str_replace("-", "", $command);
 152                                 $data["class"]->$command($args);
 153                         }
 154                 }
 155         }
 156
 157 }
 158 ?>